Roll heater



May 18,19% @585,589

J. C. LEAF? ROLL HEATER Filed mmh 9, 1925 4 shee'tS-sheet 1 INVENTORwrrmzs@v amam/ ATTORNEY May 1s 1926.- 1,585,589

v J. C. LEAR ROLL HEATER 4 Sheets-Sheet I5 Filed March 9 1925 INVENTORATTORNEY May 1926 L5859589 A J.C.LEAR

ROLL HEATER- Filed March 9, 1925 4 Sheets-Sheet 4 Patented May 18, 1926.

UNITED STATES FAIENT @If-FICE.

ROLL HEATER.

Application led March 9, 1925.

This invention contemplates the provision of a sheet mill roll heater,by means of which the ro-lls of the mill can be quickly heated to atemperature priory to the use of 5 the mill, so that a high character ordegree of work can be accomplished from the beginning ascontra-distinguished from the present method, wherein the rolls are notproperly heated unt-il after a considerable l length of time incident tothe use of the rolls, so that the work done over a period of a day isnot of uniform character.

One of the chief characteristics of the present invention resides in theprovision of r a heater designed to completely enclose or cover therolls of the mill, and including spaced groups of a series of burnersarranged to direct the heat against the surface of the rolls, in amanner whereby the entire surface of each roll is expeditiously heatedto a proper temperature to accom-` plish the best results.

Other objects and advantages of the invention will appear when thefollowing detailed description is read in connection with theaccompanying drawings, the invention residing in the construction,combination and arrangement of parts as claimed.

In the drawings forming part of this application, like numerals ofreference indicate similar parts in the several views, `and wherein:

Figure 1 is an end elevation showing one embodiment of the invention andthe manner of using the same.

Figure 2 is a view taken at a to Figure 1.

Figure 3 is a sectional view taken on line 3-3 of Figure 1. Y

Figure t is an enlarged detail view of the arrangement of one group ofburners with relation to the baiiie plate against which the heat isdirected, the bathe being used to protect the rolls.

Figure 5 is asectional `view showing the arrangement of the air and fuelpi t es.

Figure 6 is a view similar to Flgure 1 of a modified construction.

Figure 7 is a View taken at a right angle to Figure 6.

Figure 8 is a fragmentary sectional view of the rolls showing thespacing element interposed therebetween.

Figure 9 is a perspective view of the bar right angle Serial No. 14,297.

pit usually located beneath the rlls of thc mill.

Figure 10 is a perspective view of one of the blocks used in connectionwith the bar, shown in Figure 9.

Figure 11 is a perspective view of the tightening key for the blocks,when used in the manner illustrated in Figure 9.

Figure 12 is a detail view partly in section of the supporting jack forthe heater.

Figure 13 is a perspective View of the bar which provides the connectionbetween the rolli ends of the respective sections of the heater shown inFigure 6. p

Figure 111 is a detail view showing thc relative position of the'battleplate with relation to the roll and one of the burners.

Referring to the drawingsin detail, and more particularly to Figures 1tol 5 inclusive, I have shown the rolls of the mill at 10 and 11respectively, and beneath these rolls is arranged the usual bar 12 whichprevents the rolls from falling into a pit usually disposed beneath therolls, in event that one of the rolls should break or become separatedfrom the mill structure as will be readily understood. This bar 12 isusually straight, but when the form of the invention illustrated inFigure 1 is employed, the heater structure extends so far beneath thelowermost roll 11 that it is necessary to pro vide the bar v12 with anoffset or depressed portion 13, as shown in Figure 1. The constructionof this bar is clearly illustrated in Figure 9, wherein it will be notedthat the odset or depressed portionv 13 is formed with a longitudinalslot 14C to accommodate the stems 15 of substantially T-shaped blocks 16which are used to bring the level of the bar along the intermediateortion thereof, substantially flush with tllije upper surface of saidbar, when the heater is not being used. In other words, when the heateris associated with the rolls, which is done for an appreciable length oftime before the mill is put into operation, it is necessary to have theupper surface of the bar 12 arranged in close proximity tothe lowermostroll 11, and it is in order to fill the space formed by the olfset ordepressed portion 13 of this bar, that I use a block 16 as shown inFigure 10. The blocks are arranged in end to end relation, the slot 14receiving the stems 15 of said block7 and the `blocks are held fixedrelatively by means of a key 17 shown in Fig. 11. This key is also ofsubstantially T-shaped formation and the stem 18 thereof is adaptedrtobe .ttedY in the .slot 14 as shown in Figure S). The key is formed withan upstanding lug 19 having an opening 20, while each of the blockshaving similar openings 21, the 'openings beingY provided to accommodatesuitable Wire instruments employed to facilitate the removal ofthe'blocks and key from 'the bar 12 as the occasion requires.

The heater forming the gist of the present invention,includes a casinglike cover which is `designed to completely cover vor enclose the rollsof the mill, and it is to be here understood that this casing can beconstructed'from, any suitable material, vary in size and configurationwithout departing from the spirit ofthe invention. This casing ispreferably made into sections 22 and 23 respectively, which sections maybe held associated about the rolls inl any suitable manner. The' section22 however is prel erably formed with an apertured exten tion,241pivote'd as at 25 at the lower end of the section, Vand which extensionis adapted to receive the hook 26Y carried by the adjacent endof thesection 23. The upper ends ofthese sections are provided with spacedparallel lugs 27, one ofv which supports an adjusting screw 28 whichbears against the other of said lugs so that the sections can be drawntightly rabout the' rolls for use. The casing is preferably lined withfire clay 29 as shown in Figure 3, while also arranged within thecasingare pieces ofr asbestos BO which are arranged in right angular relationto the lire clay lining 29 and adapted to engage the rolls as :showninFig. 3. Arranged exteriorly of the casing are angle iron bars 31',which of course'are. -used to aifordthe structure the desired strengthand rigidity. Arranged on each section of the casing are hooks 32 bymeans of which the heaterv in its entirety can be lifted off the rollsafter the sections have been separated at the lower ends thereof.V

Carried by each section of the casinggis spaced series of burners, theburners of each series being arrangedto extend longitudinally ofthekadjacent roll, this arrangement being clearly shown inY Figure 2. Y Anynumber of burners may be included in any one series, the burners of oneseriesfbeing indicated generally at 83 in Figure 4, being supported by apipe 34 which communicates with a pipe35,these pipes forv the respectiveseries of burners beingsuitably coupled together, and arranged incommunication with the air and fuel supply pipes 36 and 37respectiif'ely. It will'now be noted that each of the'latteri'nentio'ned pipes are provided with valves 38, while each independentburner is provided with a similar valve 39 so that an-y one of thecombination of burners in any or all of the various series of saidburners, can be employed when desired. Each of these burners includes aperforated sleeve clearly shown in Figure 4, and thcsc sleeves areadapted to be received by open ings provided in the adjacent section ofthcI casing' above described, thereby supporting the burners in themanner shown in Figure 1 each section of the casing'being provided withadditional air inletopenings 40 suitably spaced apart as shown in Figure2. Arranged Within each section of the casing is a` baille plate' or barl11 terminally supported by suitable brackets' 12, there being` one ofthese bars for each series of burners` and arranged directly in front ofsaid burners as clearly -shown in Figures and 111, the bars being soarranged to protect the rolls as will be readily understood. In ori derthat the heat from these burners will pass about each roll. so that theentire surface of the latter will be heated to a proper temperature, lemploy a spacing element iu dicated at 43, this element being in t-henature of an asbestos strip adapted to be interposed betwcen the rolls,to vallow the heat to vpassl therebetween and circulate about both rollsas willbe readily appreciated.

The invention thus far described is used as follows: l

The heater as above stated lis intended to be used `for an appreciablelength of time before the mill is put into operation, so that the rollswill be properly heated to accomplish thebest results from the verybeginning. Consequently, while the rolls 10 and 11 are idle, the heateris arranged about the rolls, the sections thereof being properlyconnected together as shown in Figures V1. and 2. Then any combinationof burners., or'all of said burners can be lighted to heat the rollstothe proper temperature,4 after which the heater can beconvenientlyremoved from'the rolls and the mill put into operation for the intendedpurpose. After the heater has been remove-d, the filling blocks 16 shownin Figure 10 are placed upon the offset or depressed vportion 13 of thebar 12. and held fixed relatively by the key 17 hereinabovedescribed,the association of these blocks and key with the bar 12 being clearlyillustrated in Figure 9. During the use of the heater however', therolls 10 and 11 are heldsui'tably vspaced apart by means of the asbestosspacing element 213 so that'the heat from the various burners 'is'notonly direct ed against the opposite sides, top and bottom of said rollsbut is also allowed to pass between the rolls and -circulate thereabout,so that the 'entire area of each roll is uniformly heated. Ashereinabove stated, the -rolls are protected' from the dames by means ofthe baile plates 41 which are arranged between the rolls and each seriesoit burners as clearly illustrated in the drawings.l

In Figure 6, lvliave shown a moditied form of the invention, wherein theheater casing constituting the body oi the heater is made into sections45 and 46 suitably connected together as at 47 at the upper endsthereof, the lower ends of these sections being spaced as clearly shown.In thisI t'orm of the invention, it is not necessary to make use of abar 12 having an offset or depression portion 13 as above described, theheater being used in connection with the ordinary straight bar 48,inasmuch as the casing does not support a large battery or series ofburners as shown in Figure 1. 1n other words, this form of the inventionis used with the rolls 49 and 50 which are adapted to revolve whilebeing heated, as distinguished from the arrangement shown in Figure 1,where the rolls 10 and 11 remain stationary. The vlower ends of thesections 45 and 46 oi the casing are connected by a plate 51 ofsubstantially V-shaped formation in cross section, the plate beingreceived by the adjacent ends of the respective sections oit the casingand having its intermediate portion reposing upon the bar 48 asillustrated in Figure 6. The design of this plate 51 is clearly shown inFigure 13. 1n addition to this construction, the heater is supported byadjustable jacks which are preferably of the construction shown inFigure 12, each jack including a base 52, and threaded rods and 54, theformer being associated with the base, while the latter is associatedwith the adjacent section of the casing, the rods being connected by asleeve 55. rlthis structure is similar to the ordinary turn buckle, sothat the casing can be raised or lowered incident to the rotation of thesleeve 55 in one or the other directions. The respective sections oitthe casing are adapted to be lined in the same manner hereinabovedescribed in connection with the preferred embodiment of the invention.Now, it will be noted upon inspection of Figure 6 that there is only twoseries of burners 56 used in connection with each section ot' thecasing, these burners being arranged as shown in Figure 6 to direct theheat against the rolls 49 and 50 at points adjacent their points ofcontact. The supply pipe 57 is suitably coupled to the fuel and airsupply pipes 58 and .59, and all of these pipes are equipped with asuitable valve 60.

When using this form of the invention, the burners 56 and 57 are lightedand the rolls slowly rotated so that the entire area of each roll issubjected to the heat from the burners while they are being rotated. Itis manifest that with either form of the invention, the rolls can beexpeditiously heated prior to the use of the mill so that a high gradeor character of work can be accomplished from the very outset.

While it is believed that from the forcgoing description, the nature andadvantages of the invention will be readily apparent, 1 desire to haveit understood that 1 do not limit myselil to what is herein shown anddescribed, and that such changes may be resorted to when desired `asfall within the scope of what is claimed.

Having thus described the invention, l.' claim:

1. A heater for sheet mill rolls comprising a heat retaining casing madein sections and designed to completely enclose said rolls, means forholding said sections associated, burn-ers supported by said casing andarranged to direct their heat toward the rolls, balile plates arrangedbetween the rolls and burners, and against which the heat is initiallydirected, and valves for said burners.

2. A heater `tor sheet mill rolls, comprising a heat retaining casingdesigned to completely cover said rolls, spaced series oit burnerssupported by the opposed sides ot the casing longitudinally of therolls, and arranged to direct their heat toward the latter, fuel and airsupply pipes supported by the casing and having valve controlcommunication with said burners, a balile plate interposed between eachseries of burners and the adjacent roll, and a valve for each burner.

3. A heater for sheet mill rolls comprising a heat retaining casing madeup in sections and designed to unitedly enclose said rolls when thelatter are stationary, means for connecting the said sections of thecasing together, spaced series of burners supported by each section andarranged to direct the heat toward and about said rolls, battle platesarranged between each series of burners and the adjacent roll, means forsupporting said bailie plates within the casing, fuel and air supplypipes arranged upon the easing and having valve controlled communicationwith said burners, and a valve for each burner.

4. A heater for sheet mill rolls comprising a heat retaining casingdesigned to completely enclose said rolls, a series of burners supportedon the vopposite sides oit the casing and arranged to direct the heatagainst sai-d rolls at points adjacent their points of contact, and toheat the entire area of said rolls, While the latter are rotated, battleplates against which the heat is initially directed, said casing havingspaced draft openings, fuel supply pipes supported by the casing, andvalves controlling the communication between the pipes and said burners.

5. A heater for sheet metal rolls comprising a heat retaining casingmade up in sections, and designed to unitedly enclose said rolls, saidseetlons'lmvng their lower end spaced apart, an angular plate supportedby said sections nd arranged to close the lower end of said easing,means supporting said easing, a series of burners supported by eachsection and arranged to direct their 11e-at toward the rolls at pointsadjacent their points 4of Contact, whereby the entire area of each rollis heated during the rotation of the latter, fuel Supply pipes Supportedby the easing und eonnnunicatng with said burners and valves controllingsaid Communie-ation.

In testimony whereof I atX my signature.

JESSE C. LEAR.

